Difference between revisions of "Lecture23ECE264Spring2012" - Rhea

Revision as of 05:50, 9 April 2012

Lecture 23 _4/5_Kailu Song

Review for exam 2,students could ask question 1.read file FILE *fptr;

fptr = fopen(filename,"rb");

int a;

double b;

fread(&a,sizeof(int),1,fptr);

fread(&b,sizeof(double),1,fptr);

Person P;

fread(&P,sizeof(Person),1,fptr);

int arr[10];

fread(arr,sizeof(int),10,fptr);

int ch;

ch = fgetc(fptr);

char = oneline[256];

fets(oneline,256,fptr);

(stop at '\n', or reach the limit'\o');

int a,b;

fscanf(fptr,"%d %d", &a,&b);

strlen not include '\o';

strcpy,strstr,strcat;

2.linklist with n nodes sorted,insert one more value

3, three outcomes:1.file;2.structure;3.dynamic structure(linked list);

========================================

Shiyu Wang Lec23 April 8th

Review for Exam2

randon access

arr[5]

arr[29]

FILE* fptr; fptr = fopen(filename,"rb");

                   (binary)

int a;

double b;

fread(&a,sizeof(int),1 fptr);

fread(&b,sizeof(double),1,fptr);

int ch;

ch=fgetc(fptr);

char oneline[256];

fgets(oneline,256,fptr);

(it will stop at'\n' or reach the limit'\0')

How to use strcpy, strstr, strcat

=======

Kevin Tan(0023987592), section#2 notes 04/05

random access

arr[5]; arr[9];

FILE *fp= NULL; fp = fopen(filename,"rb");

int a; double b; fread(&a,sizeof(int),1,fp); fread(&b,sizeof(double),1,fp); . . fscanf(fp,"%d%d",&a,&b);

Wudi Zhou, Professor Lu's section, April 9th

Exam 2 covers: File I/O, Structure, Dynamic Structure,recursive

FILE * fptr; fptr = fopen(filename,"rb"); int a; double b; fread(&a, sizeof(int),1,fptr); fread(&b,sizeof(double),1,fptr);

fptr = fopen(filename,"b"); ch = fgetc(fptr); char oneline[256]; gets(oneline,256,fptr);

fscanf(fptr,"%d", &a);/*return 1 if successful*/ fscanf(fptr,"%d",&a, &b); /*return 2 if both successful*/

Person P; fread(&p, sizeof(person),1,fptr); int arr[10]; fread(arr,sizeof(int),10,fptr); fwrite(&p,sizeof(person),1,fptr);